Make Model Spec REXTON RX230; 2.3 4 CYL. SEREXTON RX270 D: 2.7D. S, SE, SXREXTON RX280. 2WD, 2.8 GAS.REXTON RX290 D; 2.9 D. E, S, SEREXTON RX320; 3.2 V6. SEREXTON. 16 OPTIONREXTON. 2.7 XDI SPORTREXTON. STANDARD What should my pressure be?